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Adsorption of Textile Dyes on the Shells of Snails Achatina achatina and Lanistes varicus Acclimatized in Benin: Influence of Their Heating Treatment

Bonou, Sidoine and Sagbo, Etienne and Osseni, Sèmiyou Ayélé and Charvillat, Cédric and Ben-Nissan, Besim and Cazalbou, Sophie Adsorption of Textile Dyes on the Shells of Snails Achatina achatina and Lanistes varicus Acclimatized in Benin: Influence of Their Heating Treatment. (2018) Journal of Environmental Protection, 09 (02). 158-174. ISSN 2152-2197

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Official URL: https://doi.org/10.4236/jep.2018.92012

Abstract

The characterization of the shells of snails Achatina achatina and Lanistes varicus indicates that they contain calcium carbonate (98%) essentially aragonite, and organic matter (2%). The heating at 500°C during three hours (3 h) has destroyed their constitutive organic matter, converted the aragonite form completely into the calcite and reduced their specific surfaces. The effects of these modifications have been revealed in the adsorption in aqueous environment of methylene blue (MB) and methyl orange (MO) which are respectively cationic and anionic dyes. The results showed that the sorption of these dyes on the raw shells is more important than the heated shells. The methylene blue has more affinity for shells than methyl orange. Between these two types of snails, the shells of Lanistes varicus have a higher capacity of adsorption. This sorption of the methylene blue is more in relationship with the Freundlich model ( for EG and for EA) comparatively to Langmuir model If the shells of these snails were calcined before using for the cicatrizing of the human cutaneous wounds in Benin. In the case of the sorption of organic molecule, it will be necessary to avoid submitting them to a preliminary heat treatment.

Item Type:Article
Additional Information:Copyright © 2018 by authors andScientific Research Publishing Inc.This work is licensed under the CreativeCommons Attribution InternationalLicense (CC BY 4.0).
HAL Id:hal-02393857
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Université d'Abomey-Calavi - UAC (BENIN)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > University of Technology, Sydney - UTS (AUSTRALIA)
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Deposited By: Yves MOMBOISSE
Deposited On:04 Dec 2019 14:20

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